Casio G-Shock CasiOak GA-2100-1ADR Analog-Digital Men's Watch

The Casio G-Shock GA-2100-1ADR is an analog-digital watch from the popular G-Shock 2100 Series, combining a distinctive octagonal bezel, minimalist black styling, and Carbon Core Guard construction. Known among watch enthusiasts as the CasiOak, this model offers a modern take on G-Shock's traditional toughness with a slimmer, more streamlined design.

Priced at ৳17,000 in Bangladesh, the Casio GA-2100-1ADR is an attractive option for customers who want a versatile everyday watch with a distinctive look. Its black resin band, octagonal case, and analog-digital display create a balanced design that suits casual outfits, everyday activities, and different personal styles.

One of its main technical highlights is the Carbon Core Guard structure. Casio uses carbon-fibre-reinforced resin in the case to provide a strong, lightweight protective structure around the watch module. This construction keeps the watch thin at just 11.8 mm and light at only 51 grams.

The watch features mineral glass, shock-resistant construction, and 200-metre water resistance. Its quartz movement runs on two SR726W batteries, offering about three years of battery life.

The analog display features traditional hour and minute hands, while the digital screen shows additional information such as the date, month, seconds, and other timekeeping details.

Additional functions include world time across 31 time zones, a 1/100-second stopwatch, a 24-hour countdown timer, five daily alarms, and Double LED Super Illuminator lighting.

The Casio G-Shock GA-2100-1ADR comes with a 2-year international warranty at SecondBit. Customers in Bangladesh can explore this model through the SecondBit website or visit the showroom in Gulshan 1, Dhaka.

Casio G-Shock GA-2100-1ADR Specifications

• Brand: Casio
• Collection: G-Shock
• Series: 2100 Series
• Official Model: GA-2100-1A
• Full Reference: GA-2100-1ADR
• Nickname: CasiOak
• Movement: Quartz Analog-Digital
• Display: Analog and Digital
• Case Dimensions: 48.5 × 45.4 × 11.8 mm
• Weight: 51 g
• Case and Bezel Material: Carbon / Resin
• Construction: Shock Resistant
• Protective Structure: Carbon Core Guard
• Case Shape: Octagonal
• Case Colour: Black
• Dial: Black
• Crystal: Mineral Glass
• Band: Black Resin
• Compatible Wrist Size: 145–215 mm
• Water Resistance: 200 metres
• Battery: 2 × SR726W
• Approximate Battery Life: 3 years
• Accuracy: ±15 seconds per month
• World Time: 31 time zones, 48 cities and UTC
• Stopwatch: 1/100-second stopwatch
• Stopwatch Capacity: Up to 24 hours
• Countdown Timer: Up to 24 hours
• Alarm: Five daily alarms
• Hourly Time Signal: Yes
• Illumination: Double LED Super Illuminator
• Afterglow: Yes
• Illumination Duration: Selectable 1.5 or 3 seconds
• Calendar: Full automatic calendar through 2099
• Hand Shift Function: Yes
• Time Format: 12/24-hour
• Price in Bangladesh: ৳17,000
• Warranty: 2-Year International Warranty

Design and Build Quality

The Casio G-Shock GA-2100-1ADR is recognised for its octagonal bezel and slim case profile.

Unlike traditional square G-Shock designs, the 2100 Series introduces a more contemporary shape while retaining the brand's protective construction.

Its all-black appearance gives the watch a versatile character, making it suitable for customers who prefer understated styling rather than bright colours or elaborate dial designs.

Case and Dial Design

The watch features an octagonal case measuring 48.5 × 45.4 × 11.8 mm.

Its slim profile is one of the most recognisable characteristics of the GA-2100 family. Despite its relatively lightweight construction, the watch retains G-Shock's shock-resistant design.

The dial combines analog hour and minute hands with a digital display, allowing the wearer to access both traditional timekeeping and additional electronic information.

The black colour scheme creates a minimalist appearance, while the octagonal bezel gives the watch its distinctive CasiOak identity.

The 51-gram weight also makes it a relatively lightweight option within the G-Shock collection.

Bracelet or Strap

The Casio GA-2100-1ADR uses a black resin band that complements the case and bezel.

Its resin construction follows the G-Shock collection's practical design approach, providing a flexible strap suitable for everyday use.

The band fits wrists 145–215 mm, letting the wearer adjust the fit to their wrist circumference.

The black finish also maintains the watch's understated appearance and makes it easy to coordinate with different outfits.

Crystal and Water Resistance

The GA-2100-1ADR uses mineral glass to protect its analog-digital display.

Its 200-metre water resistance, equivalent to 20 bar, is another important characteristic.

Combined with shock-resistant construction, this makes the watch suitable for customers seeking a durable everyday timepiece.

As with all water-resistant watches, users should follow Casio's operating instructions and precautions when using the watch around water.

Movement and Performance

Movement and Calibre

The Casio G-Shock GA-2100-1ADR uses a battery-powered quartz analog-digital movement.

Its combination display provides conventional analog timekeeping through two hands, alongside a digital display for additional information.

The hour and minute hands move in 20-second increments, while the digital display shows seconds, PM indication, month, and date.

The movement also supports world time, a stopwatch, a countdown timer, and daily alarms.

A Hand Shift function moves the analog hands away from the digital display when necessary, allowing the wearer to view information without obstruction.

Power Reserve and Accuracy

The GA-2100-1ADR uses two SR726W batteries and offers about three years of battery life.

Unlike automatic mechanical watches, its timekeeping does not depend on wrist movement or manual winding.

Casio specifies an accuracy of ±15 seconds per month.

Its battery-powered quartz system offers straightforward operation, while the approximate three-year battery life reduces the need for frequent battery replacement under normal operating conditions.

Functions and Complications

The Casio G-Shock GA-2100-1ADR provides several useful functions for everyday timekeeping.

• World Time: Offers 31 time zones covering 48 cities and UTC, with daylight-saving settings.
• Stopwatch: Measures elapsed time with 1/100-second precision during the first 60 minutes, with extended measurement up to 24 hours.
• Countdown Timer: Supports countdown settings of up to 24 hours.
• Five Daily Alarms: Lets the wearer set five daily alarms.
• Hourly Time Signal: Provides an audible hourly notification.
• Double LED Super Illuminator: Illuminates both the analog face and digital display.
• Selectable Illumination Duration: Allows the wearer to choose 1.5 or 3 seconds of illumination.
• Afterglow: Keeps the display illuminated briefly after activation.
• Full Automatic Calendar: Supports calendar operation through 2099.
• 12/24-Hour Format: Lets you choose your preferred digital time format.
• Hand Shift Function: Moves the analog hands away from the digital display to improve visibility.
• Button Operation Tone: Can be switched on or off.

These features make the GA-2100-1ADR a practical analog-digital watch, not just a timepiece focused on appearance.

Features and Everyday Use

The Casio G-Shock GA-2100-1ADR combines a contemporary octagonal design with practical G-Shock functionality.

Its slim 11.8 mm profile and lightweight 51-gram construction suit customers who prefer a less bulky watch.

The Carbon Core Guard structure adds protection, while the mineral glass and 200-metre water resistance add everyday practicality.

Its analog-digital display allows the wearer to read time traditionally while accessing digital information when needed.

World time is useful for checking different time zones, while the stopwatch and countdown timer support everyday timing tasks.

The Double LED Super Illuminator provides visibility in darker conditions by illuminating both the analog face and digital display.

The all-black design also makes it a versatile choice for customers who prefer a minimalist sports watch that complements casual, everyday clothing.

Overall, the GA-2100-1ADR combines the signature CasiOak look, Carbon Core Guard construction, and practical digital functions in a slim G-Shock design.

Why Is the Casio GA-2100-1ADR Called CasiOak?

Watch enthusiasts commonly call the Casio GA-2100-1ADR the CasiOak.

The nickname combines Casio and Royal Oak, referring to the octagonal bezel that gives the 2100 Series its distinctive look.

Although the name is not an official Casio designation, it has become widely associated with the GA-2100 family.

The CasiOak identity reflects the watch's combination of contemporary styling, angular case design, and everyday versatility.

For customers who appreciate the octagonal watch aesthetic but prefer a G-Shock with shock-resistant construction and a more accessible design, the GA-2100-1ADR is an appealing option.

Who Should Consider the Casio G-Shock GA-2100-1ADR?

The Casio G-Shock GA-2100-1ADR may appeal to several types of watch buyers.

• G-Shock enthusiasts: Buyers who appreciate the brand's toughness and recognisable styling may enjoy this modern 2100 Series design.
• CasiOak enthusiasts: Its octagonal bezel appeals to customers looking for the popular CasiOak aesthetic.
• Minimalist watch buyers: The all-black design offers a clean appearance suitable for everyday wear.
• Analog-digital watch enthusiasts: Its combination display provides traditional hands alongside digital functionality.
• Lightweight watch enthusiasts: Its 51-gram weight and 11.8 mm thickness make it a slim, lightweight G-Shock.
• Everyday watch buyers: The combination of world time, stopwatch, countdown timer, and alarms supports daily timekeeping needs.
• Active lifestyle users: Shock resistance and 200-metre water resistance offer practical benefits.

At ৳17,000, the GA-2100-1ADR is especially relevant for customers who want the classic CasiOak look with G-Shock durability and everyday functionality.

Why Buy the Casio G-Shock GA-2100-1ADR from SecondBit?

Shop Online or Visit Our Showroom

SecondBit lets customers buy branded watches online or visit its physical showroom before purchasing.

Customers who prefer to see a watch in person can visit:

SecondBit Showroom

Shop 470, Level 3, Police Plaza Concord Shopping Mall, Gulshan 1, Dhaka, Bangladesh.

You can also explore the available watch collection through the SecondBit website.

Payment and EMI Options

SecondBit offers several payment methods for customers purchasing the Casio G-Shock GA-2100-1ADR.

Available options include:

• Credit card payments.
• Debit card payments.
• Mobile Financial Services (MFS).
• Bank transfer.
• Cash on delivery with a 10% advance payment and the remaining amount payable after receiving the order.
• EMI facilities through 30+ banks and MFS providers, subject to eligibility and applicable provider terms.

Customers can review the SecondBit payment policy for additional information about payment methods and applicable conditions.

Nationwide and Dhaka Delivery

SecondBit offers delivery throughout Bangladesh, subject to applicable service terms.

Customers inside Dhaka City can also request instant delivery through Pathao or Uber Instant Delivery after completing full payment, subject to service availability.

Showroom pickup is another available option for customers who prefer to collect their purchase in person.

For more information, please review the SecondBit delivery policy.

How to Purchase the Casio G-Shock GA-2100-1ADR

Customers can order through our website and choose an available payment method.

The purchasing process is straightforward:

1. Visit the SecondBit website.
2. Find the Casio G-Shock GA-2100-1ADR product page.
3. Review the product specifications, price, and warranty.
4. Place your order using the available ordering options.
5. Choose a suitable payment method, including credit card, debit card, MFS, or bank transfer.
6. If choosing cash on delivery, complete the required 10% advance payment and pay the remaining amount after receiving your order.
7. Customers interested in EMI can explore the available facilities through 30+ banks and MFS providers, subject to applicable terms.
8. Customers can also visit the SecondBit showroom to inspect the watch before purchasing.
9. Showroom pickup is available for customers who prefer collecting their purchase.
10. Nationwide delivery is available, with Dhaka instant delivery through Pathao or Uber Instant Delivery after full payment, subject to availability.

Please review the terms and conditions, payment policy, and delivery policy before placing your order.

Frequently Asked Questions About the Casio G-Shock GA-2100-1ADR

What is the price of Casio G-Shock GA-2100-1ADR in Bangladesh?

The Casio G-Shock GA-2100-1ADR is priced at ৳17,000 at SecondBit. Contact our team to confirm current availability and purchasing details.

Does Casio G-Shock GA-2100-1ADR come with a warranty?

Yes. The Casio G-Shock GA-2100-1ADR comes with a 2-year international warranty. Coverage depends on the applicable warranty terms and conditions.

Can I order Casio G-Shock GA-2100-1ADR online?

Yes. You can order the Casio G-Shock GA-2100-1ADR through our website and choose an available payment method. Available online payment methods include credit cards, debit cards, MFS, and bank transfer. Cash on delivery is also available with a 10% advance payment. You can pay the remaining amount after receiving your order.

Can I buy Casio G-Shock GA-2100-1ADR on EMI?

Yes. SecondBit offers EMI through 30+ banks and MFS providers, with flexible monthly payment plans. Eligibility and installment terms depend on the applicable bank or provider conditions.

Does SecondBit deliver Casio G-Shock GA-2100-1ADR across Bangladesh?

SecondBit offers nationwide delivery, subject to applicable service terms. Instant delivery is also available inside Dhaka City through Pathao or Uber Instant Delivery after full payment. Contact our team to confirm delivery options for your location.

Can I inspect Casio G-Shock GA-2100-1ADR before purchasing?

Yes. You can visit the SecondBit showroom at Shop 470, Level 3, Police Plaza Concord Shopping Mall, Gulshan 1, Dhaka, Bangladesh, to inspect the timepiece before deciding. Showroom pickup is also available. Please confirm product availability before visiting.

Where can I buy Casio G-Shock GA-2100-1ADR in Bangladesh?

You can purchase the Casio G-Shock GA-2100-1ADR through the SecondBit website or visit the SecondBit showroom at Shop 470, Level 3, Police Plaza Concord Shopping Mall, Gulshan 1, Dhaka, Bangladesh.

What is covered by the Casio G-Shock GA-2100-1ADR warranty?

The Casio G-Shock GA-2100-1ADR comes with a 2-year international warranty. Warranty coverage is subject to the applicable terms and conditions. Physical damage and repairs carried out by a third party may void the warranty where specified in the applicable terms. Refer to the relevant warranty documentation for the complete coverage, exclusions, and service conditions.

Why is the Casio GA-2100-1ADR called CasiOak?

The nickname CasiOak combines Casio and Royal Oak and refers to the octagonal bezel shape of the 2100 Series. It is an informal collector nickname, not an official manufacturer designation.

Is the Casio G-Shock GA-2100-1ADR automatic or quartz?

The GA-2100-1ADR is a battery-powered quartz analog-digital watch. It uses two SR726W batteries and does not have an automatic mechanical movement.

How long does the Casio GA-2100-1ADR battery last?

Casio specifies an approximate battery life of three years using two SR726W batteries. Actual battery life may vary depending on usage and operating conditions.

Is the Casio G-Shock GA-2100-1ADR suitable for swimming?

The watch has 200-metre water resistance, equivalent to 20 bar. It is designed for substantial water exposure under Casio's specified conditions. Always follow the manufacturer's operating instructions and water-resistance precautions.

What is Carbon Core Guard technology in the GA-2100-1ADR?

Carbon Core Guard is Casio's protective case construction that uses carbon-fibre-reinforced resin to protect the watch module. It contributes to the watch's lightweight construction, strength, and slim 11.8 mm profile.